Skiving-machine.



4 SHBETS-SHEET 1.

Patented July 4, 1911.

SKIVING MACHINE. APPLICATION FILED JUNE 15, 1907.

F. L. ALLEY & PAGK.

P. L. ALLEY & W. PACK.

SKIVING MACHINE. APPLIUA'IION FILED JUNE 15, 1907.

Patented July 4, 1911.

'87 [e 4 SHEETS-SHEET 2.,

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COLUMBIA PLANOGRAPH c0., WASHINGTON, D. c.

F. L. ALLEN; W. PACK.

SKIVING MACHINE. APPLICATION FILED JUNE 16, 1907.

Patented Jul) 4, 1911.

4 SHEETS-SHEET 3.

l'izvezz t'ars Wt Izesses.

Patented July 4, 1911. 4 SHEETS-SHEET 4.

1. ll/ll/ F. L. ALLEY & W. PACK.

SEWING MACHINE.

APPLICATION IILBD mums. 1907.-

Witnesses.

COLUMBIA PLANOKIRAPH (30., WASHINGTON. D. c.

UNITED srarns rarnnr orrroni.

FREDERICK L. ALLEY, F SYDNEY, AND WALTER PACK, OF NEUTRAL BAY, NEARSYDNEY, NEW SOUTH WALES, AUSTRALIA, ASSIGNORS T0 UNITED SHOE MA- CHINERYCOMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

SKIVING-MACHINE.

To all whom 'it may concern:

Be it known that we, FREDERICK L. ALLEY, a citizen of the United States,and WALTER PAoK, a subject of the King of Great Britain, residing atSydney, New South Wales, Australia, and Neutral Bay, near said Sydney,respectively, have invented certain Improvements in Skiving-Machines ofwhich the following description, in connection with the accompanyingdrawings, is a specification, like reference characters on the drawingsindicating like parts in the several figures.

This invention relates to skiving machines and more particularly tomachines for skiving articles of leather.

The invention is herein shown embodied in a counter skiving machinecomprising a die carrier, herein shown as a die roll, having a diecavity of the shape of a skived blank and a feed roll for pressing thestock into the die cavity arranged for movement toward and from the dieroll and acting in conjunction with the die roll to force the stockagainst a stationary knife.

The primary object of the invention is to overcome a defect which wehave observed in the operation of prior machines of this type. Inmachines of the character shown, the feed roll is held yieldingly towardthe I die roll and in the insertion of a blank the rolls are forcedapart by the blank as it is drawn between them. It will be seen that, onaccount of the pressure exerted by the rolls upon a blank, there is someresistance to the entrance of the blank between them. At times, when ablank is presented to the machine, the rolls do not grip it immediatelywith suflicient force to overcome this resistance and the passage of theblank through the machine is not properly timed. The consequent failureof the blank to register accurately with the die cavity causes theproduction of a thick edge upon the forward end of the blank, while therear end is skived to a thin edge. This difficulty is particularlyliable to be met with where the surface of the feed roll isformed partlyor wholly of yielding material, since where such material is employedthere is greater likelihood of the rolls slipping upon the stock thanwhere the entire surface of the fed roll is a roughened metallicsurface.

To overcome obj ections such as those men- Specification of LettersPatent.

Application filed June 15, 1907.

Patented July 4:, 1911.

Serial No. 379,278.

tioned, the present invention contemplates the provision, in a machineof the type re ferred to, of means for temporarily relieving thepressure of engagement of the rolls with the stock during the insertionof the stock between the rolls. Where, as in the present machine, asingle skiving operation is completed during one revolution of the dieroll, the arrangement is preferably such that the relief of saidpressure occurs at a predetermined point in each revolution of the dieroll. While any arrangement for temporarily relieving the pressure ofthe rolls upon the stock is within the scope of the present invention,it is preferred to construct the parts in such a way that the rolls willbe automatically forced apart to permit the entrance between them of thestock to be skived. A convenient construction comprises a cam arrangedupon one of the shafts which support the die roll and the feed roll,respectively, said cam, in the machine shown, be ing' arranged to movethe feed roll shaft away from the die roll for a short interval of timeat a predetermined point in the revo lution of the die roll.

In the counter skiving machine herein shown the die cavity is arrangedtransversely about the die roll. The feed roll hereinafter described isprovided with a narrow metallic section arranged intermediate its ends,the remaining portion of the roll being formed of yielding material. Tosecure the best results, the metallic section of the roll should be insubstantial alinement with the longitudinal central line of the diecavity. In order to permit this to be accomplished, where the form orsize of the die cavity is subject to change, for example in skivingblanks of difi'erent sizes, another feature of the inven tion consistsin arranging the feed roll for convenient adjustment longitudinally ofthe die roll.

Other features of the invention, the advantages of which will beapparent to one skilled in the art, will be hereinafter described anddefined in the claims.

In the drawings, which illustrate a machine constituting one embodimentof the invention,Figure 1 is a view in perspective of the more importantparts of the machine; Fig. 2 is a View in plan of the machine shown inFig. 1, the rolls being shown in their closed position; Fig. 3 is a Viewsimilar to Fig. 2, illustrating the position of the parts when the rollsare forced apart to permit the insertion of a blank; Fig. 4 is avertical sectional View on the line 4-4 of Fig. 2; Fig. 5 is an end viewof the rolls in a position corresponding to that of the parts in Fig. 4;Fig. 6 is a vertical sectional View on the line 6-6 of Fig. 3; Fig. 7 isan end View of the rolls in a position corresponding to the position ofthe parts in Fig. 6; Fig. 8 is a perspective view of a detail; Fig. 9 isa sectional View on the plane 99 of Fig. 8; Fig. 10 is a View inperspective of the feed roll and its adjusting mechanism; Fig. 11 is aview in plan of the parts shown in Fig. 10, with port-ions in section onthe plane 11-11 of Fig. 10.

In the figures of the drawings, 10 represents a die roll secured infixed position upon a shaft 11, said shaft being arranged for rotationin stationary bearings 12 and 13. A feed roll 20 is mounted upon a shaft19 arranged for rotation in bearings 21, 22, formed in an arm 23, saidarm being arranged for pivotal movement about a suitable supportingstud, mounted upon a supporting frame 36, as will appear from'Fig. 1.The frame 36 is provided with a cavity adjacent the lower end of the arm23, said cavity being formed to receive a spring 37. A washer 38 bearsupon the outer end of said spring, said washer being entered by the endof a screw 39 adjustably secured in the lower end of the arm 23. It willbe seen that the spring 37 holds the shaft 19 yieldingly toward theshaft 11 and that the pressure with which said shaft 19 is forced towardthe shaft 11 may be varied by adjusting the screw 39. To insure that theblank to be skived will be introduced between the rolls at the properpoint in the revolution of the die roll 10, said roll is provided withan end gage 27 with which the end of the blank may be brought in contactwhen presented to the machine. The construction of said end gage iswithout novelty and its arrangement and mode of operation may be thesame as that disclosed in U. S. Letters Patent, 521,090, granted June 5,1894, to J. R. Scott.

The shaft 11 is provided at a point intermediate its ends with a pinion14, said pinion meshing with a pinion 17 arranged upon the shaft 19. Tothe pinion 14 is secured a cam 15 as illustrated in Fig. 8. Said cam 15is provided with an inclined face 24, which, at each rotation of theshaft 11 engages the hub 18 of the pinion 17, and in its movementgradually forces the shaft 19 into the position illustrated in Figs. 3,6 and 7. The teeth upon the gears 14 and 17 are of such length that theyare in contact at the point of maximum separation of the shafts 11 and19.

As will appear from the drawings, the

feed roll 20 is provided with a corrugated metallic section 40,intermediate its ends, the remaining portion of the roll being formed ofyielding material such as rubber. A bracket 33 is secured to the upperportion of the arm 23, said bracket being provided with bearings 32 inwhich is arranged a threaded spindle 30. The spindle 30 is provided witha depending arm 29, said arm 29 being provided with a perforation at itslower end to receive loosely the shank of a screw 28 inserted in the endof shaft 19. An adjusting wheel 35 is mounted upon the spindle 30between the bearings 32. It will be seen that by manipulating the wheel35, the shaft 19 may be adjusted longitudinally to the precise positiondesired. The pinion 17 and its hub 18 are splined upon the shaft 19, sothat said shaft may be adjusted longitudinally without disturbing theposition of said pinion.

The operation of the machine shown will be readily understood from theabove description. In each rotation of the die roll, at a predeterminedpoint, the feed roll is moved gradually away from the die roll. In Fig.6 the parts are shown with the feed roll at the limit of its outwardmovement and it will be clear from said figure that the relativeposition of the die roll and the feed roll is adapted to facilitate themanual insertion of a counter bet-ween the rolls. In the furthermovement of the die roll from the position shown in Fig. 6, the cam 15allows the feed roll to close quickly upon the counter and the two rollscooperate to force the counter against the knife, the portion of thecounter lying outside of the die cavity being skived off in the usualmanner. It will be observed that the movement of the feed roll away fromthe die roll is gradually secured by a progressive movement of the cam.This is of advantage in that it obviates the shock to the parts whichwould be occasioned by an abrupt separation of the rolls and which hasalways occurred in prior machines where the rolls have been separated bythe blank itself.

By the manipulation of the wheel 35, the metal section of the feed rollmay be adjusted to bring it opposite the longitudinal central line ofthe die cavity, as will be obvious from the drawings and the abovedescription. This operation may be performed, if desired, while therolls are in rotation.

Having described our invention, what we claim as new and desire tosecure by Letters Patent of the United States is:

l. A skiving machine, having in combination, a knife, a die carrier anda feed roll for advancing the stock to be skived against the knifearranged to have engagement with the opposite sides of the stock, andautomatic means for temporarily relieving the pressure of engagement ofsaid carrier and feed roll with reference to a determined position ofthe die carrier.

2. A skiving machine, having in combination, a knife, a plurality ofrolls for advancing the stock to be skived against the knife, means forholding said rolls yield ingly together, and means for automaticallyspreading the rolls temporarily apart to permit the stock to be pressedinto the die cavity.

3. A skiving machine, having in combination, a knife, a plurality ofrolls for ad vancing the stock against the knife arranged to haveengagement with opposite sides of the stock, and means for automaticallyrelieving the pressure of engagement of the rolls with the stock duringthe insertion of the stock between them.

4. A skiving machine, having in combina tion, a knife, a die carrierhaving a cavity of a predetermined form, a feed roll cooperating withsaid die carrier to advance the stock against the knife and constructedto press the stock into the die cavity, means for holding said roll andcarrier yieldingly together and means for temporarily spreading themapart at a predetermined point in the operation of the die carrier.

5. A skiving machine, having in combination, a knife, a plurality ofshafts arranged on opposite sides of said knife, a die roll mounted uponone of said shafts, and a feed roll mounted upon the other shaft inposition to cooperate with the die roll in advancing the stock againstthe knife, means for yieldingly holding the feed roll shaft toward thedie roll shaft and a cam arranged upon one of said shafts for moving thefeed roll shaft away from the die roll shaft at a predetermined point inthe revolution of the die roll. 7

6. A skiving machine, having in combination, a die roll provided with adie cavity of a predetermined form, a feed roll formed of yieldingmaterial and provided with a metallic section intermediate its endsarranged to engage the stock at substantially the middle part of the diecavity and means for adjusting the feed roll longitudinally of the dieroll.

7. A skiving machine having in combination, a knife, a die carrier and afeed roll for advancing the stock to be skived against the knifearranged to have engagement with the opposite sides of the stock, andmeans for temporarily relieving the pressure of engagement of saidcarrier and feed roll with the stock at a predetermined point in theoperation of the die carrier.

8. A skiving machine having in combination, a knife, feeding mechanismconstructed and arranged to engage the stock upon opposite sides with ayielding pressure and advance the stock against the knife and means forrelieving the pressure of engagement of said feeding mechanism with thestock during the insertion of the stock therein.

9. A skiving machine having in combination a knife, a die roll, a feedroll, yielding means for holding said rolls together and means forspreading the rolls temporarily apart, said last named means becominginoperative as soon as the stock has been inserted, whereby said stockis immediately pressed into the cavity in the die roll.

10. A skiving machine having in combination a knife, a die roll, a feedroll, yielding means for holding said rolls together and automatic meansfor temporarily separating the rolls during the operation of themachine.

11. A skiving machine having in combination a knife, a die roll, a feedroll, means for driving said rolls continuously and automatic means forseparating said rolls temporarily during each revolution of said dieroll a number of times equal to the number of die cavities in said dieroll.

In testimony whereof I, the said FRED- ERICK L. ALLEY, have signed myname to this specification in the presence of two subscribing witnesses.

FREDERICK L. ALLEY.

Witnesses:

BERNARD BARROWS, H. DORSEY SPENCER.

In testimony whereof I, the said WAL'rER PACK, have signed my name tothis specification in the presence of two subscribing Copies of thispatent may be obtained for five cents each, by addressing theCommissioner of Patents, Washington, D. C.

